// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef IPC_ATTACHMENT_BROKER_PRIVILEGED_WIN_H_
#define IPC_ATTACHMENT_BROKER_PRIVILEGED_WIN_H_

#include "base/macros.h"
#include "ipc/attachment_broker_privileged.h"
#include "ipc/handle_attachment_win.h"
#include "ipc/ipc_export.h"

namespace IPC {

// This class is a concrete subclass of AttachmentBrokerPrivileged for the
// Windows platform.
class IPC_EXPORT AttachmentBrokerPrivilegedWin
    : public AttachmentBrokerPrivileged {
public:
    AttachmentBrokerPrivilegedWin();
    ~AttachmentBrokerPrivilegedWin() override;

    // IPC::AttachmentBroker overrides.
    bool SendAttachmentToProcess(
        const scoped_refptr<IPC::BrokerableAttachment>& attachment,
        base::ProcessId destination_process) override;

    // IPC::Listener overrides.
    bool OnMessageReceived(const Message& message) override;

private:
    using HandleWireFormat = internal::HandleAttachmentWin::WireFormat;
    // IPC message handlers.
    void OnDuplicateWinHandle(const Message& message);

    // Duplicates |wire_Format| from |source_process| into its destination
    // process. Closes the original HANDLE.
    HandleWireFormat DuplicateWinHandle(const HandleWireFormat& wire_format,
        base::ProcessId source_process);

    // Copies an existing |wire_format|, but substitutes in a different handle.
    HandleWireFormat CopyWireFormat(const HandleWireFormat& wire_format,
        int handle);

    // If the HANDLE's destination is this process, queue it and notify the
    // observers. Otherwise, send it in an IPC to its destination.
    void RouteDuplicatedHandle(const HandleWireFormat& wire_format);

    DISALLOW_COPY_AND_ASSIGN(AttachmentBrokerPrivilegedWin);
};

} // namespace IPC

#endif // IPC_ATTACHMENT_BROKER_PRIVILEGED_WIN_H_
